The purpose of this study is to set the standard job duties of King Sejong Institute teachers by analyzing the work status of teachers dispatched to King Sejong Institute and local teachers. The job analysis of King Sejong Institute teachers can contribute to not only pursuing work efficiency by clearly defining the work of teachers, but also to establish the identity of teachers and to establish the direction of retraining. To this end, in this research, the work of King Sejong Institute teachers was primarily analyzed through a preliminary survey, and in this study, the standard duties of King Sejong Institute teachers were derived based on the jobs derived through the preliminary survey results. As a result of the survey, job categories such as ‘Korean class preparation, class preparation and evaluation, online-based Korean class, educational material development and research, student management, administrative work, student counseling, teacher meetings and seminars, cultural classes, and King Sejong Institute events’ were derived, and detailed duties were able to be derived accordingly. In addition, this study examined the possibility of variation in standard job duties according to the type of King Sejong Institute. The standard job analysis of King Sejong Institute teachers derived in this study will contribute to the improvement of the equal quality of King Sejong Institute education and provide a reference point for the job setting of teachers at overseas Korean language education institutions.